34566-1903

Heilind Number:	MOL34566-1903
Manufacturer:	Molex
Manufacturer Number:	34566-1903
Datasheet:	Packaging Specifications
ECAD Model:

Description:

2.54mm Pitch, MX123 Female Receptacle Housing, Keying Option G, Wire Dress Option 9, 80 Circuits, Blue TPA

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Specifications

Attribute	Value
Product Category:	Pin & Socket Housings & Contacts Pin & Socket Housings
Manufacturer:	Molex
Manufacturer Part Number:	Molex 34566-1903
Color:	Blue
Series:	34566 - MX123
Amperage:	11 A, 25 A
Connector Type:	MX123
Gender:	Receptacle
Housing Material:	Nylon
Number of Contacts:	80
Number of Rows:	4
Pitch:	2.54 mm
Material:	Nylon
Keying:	Yes
Operating Temperature Range:	-40 - 125 °C
Circuit Application:	Power
Polarized to Mate:	Yes
Connector System:	Wire to Board
Termination Pitch:	2.54 mm
Glow Wire Capable:	No
Lock to Mating Part:	Yes
Stackable:	No
Part Aliases:	0345661903
Contact Detail:	80
SKU:	MOL34566-1903

Detailed Description

Introducing the 34566-1903, a high-performance connector designed for power applications. Featuring a durable nylon housing and 80 contacts arranged in 4 rows, this connector ensures reliable connectivity in demanding environments. With a current rating of 25A and 11A, it is suitable for a wide range of power-critical systems. The MX123 connector type, with a pitch of 2.54mm, offers secure wire-to-board termination. Engineered for longevity, it operates efficiently in temperatures ranging from -40 to 125°C. Its polarized and keying features guarantee proper mating orientation, while the locking mechanism adds an extra layer of security. RoHS compliant and in stock for immediate shipping, the 34566-1903 is the perfect solution for your power connectivity needs.

Frequently Bought Together

Product	Part #	Description	Stock
	Molex 33001-3004	Cut Strip - MX150 Female Terminal for Mat-Sealed Connectors, Gold Plating, 16, 18 and 20 AWG, Left Reel Payoff
	Molex 33481-0302	MX150 Sealed Male Connector, Single Row, 3 Circuits, Polarization B, without Connector Position Assurance, Light Gray
	Molex 34565-0003	MX123 73/80 Circuit Dress Cover
	Molex 34566-0803	2.54mm Pitch, MX123 Female Receptacle Housing, Keying Option H, Wire Dress Option 0, 80 Circuits, Gray TPA
	Molex 39-00-0428	Mini-Fit Female Crimp Terminal, Selective Gold (Au) and Selective Tin (Sn) over Nickel (Ni), 24-18 AWG, Reel
	Molex 39-01-2060	Mini-Fit Jr. Receptacle Housing, Dual Row, 6 Circuits, UL 94V-2, Natural

Product Change Notice

Effective Date	Description of Change	Download
04/15/2026	517169 - End of Life. LTB 9/30/25	Download
09/30/2025	516520 - Equipment Transfer, Production Transfer or Rearrangement. Molex has created this PCN to group the complete Mx123 Large footprint series together for better control over implementation. Previously the part numbers were mentioned in the transfer PCN's 514557 & 514558 and due to strategy they were retracted (516511). The molds are transferred from Lincoln, USA. The assembly line is already in Guad 2. China will continue support the EU/Asia demand.	Download
05/02/2025	516742 - Retraction of 513492. This retraction is to annunce that this PCN “513492” did not take place and Molex continues with the same compounder.	Download
02/28/2025	516511 - Partial Retraction of PCN 514557 & 514558. in these PCNs communication on 11/2023 will maintain the small footprint series whic is already in production at guadalajara site 2 plant we will create a new pcn (516520) in which we will manage the MX123 large footprint series and its implementation plan.	Download
09/02/2024	514558 - Equipment/Production Transfer or rearrangement. This notification is to inform you that will be move molds and Assy line transfer. This PCN will move from Chengdu, China to Guadalajara, Mexico (site 2) and it was made to provide the best delivery to locally production products. We are starting these transfers in later Q3 2024. No product changes will be made as part of this change.	Download
07/21/2023	513492 - Change Supplier. This letter is to inform you that in order to re-balance global supply chains, Molex will qualify a new compounder location to be used by the existing resin supplier.	Download
08/17/2022	512449 - Retraction of PCN 510937. retraction is due to the project not moving forward at this time, the compounding location for SPS/PA66 grade material will not be moving from the current sub-supplier. if it is deemed that this project will again move forward at a later date a new PCN will be created & sent to impacted customers.	Download
07/29/2022	510937 - Change Supplier. in efforts to mitigate the supply risk of resin material our current supplier for SPS/PA66 grade of material will be transitioning to a new Sub-Supplier fir compounding.	Download
10/06/2017	502808 - Equipment Transfer, Production Transfer or Rearrangement. This letter is to inform you that production of the part(s) identified in this notice are being moved to a different production or shipping location. No changes will be made to the product as a result of this move.	Download
10/15/2015	GCM 10685958 - New, Modified, Or Replacement Tooling.	Download
10/01/2015	GCM 10706555 - New, Modified, Or Replacement Tooling.	Download
06/12/2015	GCM 10685960 - New, Modified, Or Replacement Tooling.	Download
05/11/2015	GCM 10682374 - New, Modified, Or Replacement Tooling.	Download
02/20/2015	GCM 10664193 - New, Modified, Or Replacement Tooling.	Download
08/11/2014	GCM 10622037 - Product Component Change.	Download